FRUSTRATED LEWIS PAIRS · metal-free H₂ splitting
unseel.com · Stephan 2006 · B(C₆F₅)₃
acid–base gap too far
H–H bond intact
state
Lewis acid — boron (empty p)
Lewis base — phosphorus (lone pair)
H₂ → H⁺ + H⁻ (heterolytic)
Unseel.com · Frustrated Lewis Pairs